What conditions predispose adult meningitis?

1. Head trauma can cause a skull fracture that allows bacteria to enter the brain or cerebrospinal fluid (CSF), the clear liquid that surrounds the brain and spinal cord.

2. Certain medical conditions can increase the risk of meningitis, including:

- Diabetes

- HIV/AIDS

- Cancer

- Sickle cell disease

- Chronic kidney disease

- Splenectomy (removal of the spleen)

- Cochlear implants

3. Immune system disorders, such as:

- Corticosteroid therapy

- Chemotherapy

- Radiation therapy

- Organ transplant

4. Pregnancy can increase the risk of meningitis caused by certain bacteria, including:

- Streptococcus pneumoniae (pneumococcus)

- Neisseria meningitidis (meningococcus)

- Listeria monocytogenes (listeria)

5. Travel to certain areas of the world can increase the risk of meningitis, including:

- Sub-Saharan Africa

- Southeast Asia

- Central Asia

- South America